SMCXXXAF Datasheet, PDF (60/82 Pages) Numonyx B.V – 32 Mbyte, 64 Mbyte, 128 Mbyte, 256 Mbyte and 512 Mbyte 3.3 V / 5 V supply CompactFlash™ card

CF-ATA command description
SMCxxxAF
9.8
NOP command (00h)
This command always fails with the CompactFlash memory card returning command
aborted. Table 56 defines the byte sequence of the NOP command.
Table 56. NOP
Bit
7
6
5
4
3
2
1
0
Command (7)
00h
C/D/H (6)
X
Drive
X
Cyl High (5)
X
Cyl Low (4)
X
Sect Num (3)
X
Sect Cnt (2)
X
Feature (1)
X
9.9
Read Buffer command (E4h)
The Read Buffer command enables the host to read the current contents of the card’s sector
buffer. This command has the same protocol as the Read Sector(s) command. Table 57
defines the Read Buffer command byte sequence.
Table 57. Read Buffer
Bit
7
6
5
4
3
2
1
0
Command (7)
E4h
C/D/H (6)
X
Drive
X
Cyl High (5)
X
Cyl Low (4)
X
Sect Num (3)
X
Sect Cnt (2)
X
Feature (1)
X
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